The Theory of Subatomic Elves states that the nucleus of an atoms consists of tiny elves who move around different particles inside the atoms and interact with other atoms and their respective subatomic elves.

The theory was created in order to help people's understanding of complex chemistry.

Man, we learned about the Theory of Subatomic Elves today, chemistry makes so much more sense now!

The only reason those two elements chemically reacted with each other was because the subatomic elves were at work.